Seems like this might be a good time to split off a new topic.
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I think Iāve taken the idea far enough for now, apologies for the derail. My thinking on this needs time to mature.
I like the tweaks! I want one!
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love it! Want as well!! 
if there are extras of course 
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Love the panel. Donāt change the font.
For me itās not immediately clear where to put my jack with LFO output for cutoff and where for resonance, but I donāt know synthesis very well yet, so maybe thatās just me.
Both are for the cutoff frequency, but the v/oct has an exponential relation. So if you tune the Filter, you can play it like a vco! Then you can use the linear cv for vibrato or something 
Resonance has no CV.
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Sure! Not tested yet, so be patient I will order in a few days and then also put this on github.
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Thank you for explanation.
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I wouldnāt count a module as finished until youāve tested it. But thatās probably just the software developer in me speaking.
I suppose the difference is you can test it until you finish it. At least in a way.
Where did you pick up your BC557C? I found the 547s but no luck on the 5ās
DigiKey has the BC557CZL1, listed as obsolete but they have stock:
https://www.digikey.com/product-detail/en/rochester-electronics-llc/BC557CZL1/2156-BC557CZL1-ONTB-ND/11543189
Tayda has the BC557B, which is a lower gain version than the BC557C. Might work.
The docs say in reference to the paired BC547C, āThe specified transistor is BC547C, but most small-signal NPN transistors should work just fine.ā No similar remarks about the BC557C, but thatās probably a good sign ā having said you can sub the ladder transistors, if the expo converter transistors were critical theyād say so, right?
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it can drive you crazy looking for parts . canāt find it , change one dam letter / number in your search and then there is a million of them .
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Yeah, just try out any similar transistor you have aroundā¦
@klausklaerwerk used a 559C and it works:
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Just look up the Kassutronics build guide/BOM. All of his guides are really great.
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Thank ya good sir
Except you have to buy 6,010 of the BC557CZLsā¦lol. I donāt think i want to be a BC557C store 
EDIT: Mouser has BC547Cās for 7.6 cents at qty 100.
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yeah I had to buy 200 @ 24.9k resistors the min. , of which I will use less than 6 and probably never touch the rest in this life time ā¦
Iām just gonna use one of the 557Bs that i already have around. As far as the 547s the footnote was talking about using 2N3904s so I donāt think itās really that important.
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